Dp and I decided to separate this week
Been a long time coming but we finally agreed this week. No affairs and no violence etc just simply fallen out of love
I mentioned on Thursday evening that we may tell kids on Friday night , but as the weather was so lovely and kids all out playing in garden I decided to have a bbq - our close neighbours who we are self isolating with (rural farm) and their kids came down and when dp came home from work he joined us as we were every evening continuing to act as normal even though the separation has happened so quickly.
Went in at 10pm with ds and ready to go to bed and DD was in her room talking to mates
So Bloody hell - dp only went and told Dd 14 last night without me as he "couldn't hold it in any longer "

He also thought I had invited neighbours down to make the announcement 

Like wtf?? Why on earth did he think I would do that?
She was upset but I talked to her afterwards and she's ok today - she's gone to her Saturday job today where there are adults who she is close to and who will support her
Partially my fault too as I maybe should have told dp I didn't want to tell them that evening but failed to do so.
I wanted to get all our ducks in a row before I told them so we had answers to any questions that may have - see part of the problem is our communication with each other clearly.
Anyway I told DP we would draw a line under it and not argue about and So we now have to tell ds 11 today
I wanted to wait until we had exact plans in place and a date when he will move out before we told them but we must tell ds as Dd knows.
Any advice how to manage this?
Thanks